'\" t
.TH ISNSADM 8 "11 May 2007"
.SH NAME
isnsadm \- iSNS client utility
.SH SYNOPSIS
.B isnsadm
.RI [ options... ]
.RI --register " object...
.PP
.B isnsadm
.RB [ ... ]
.RI --query " attr" [= value ]
.PP
.B isnsadm
.RB [ ... ]
.RI --deregister " attr=value
.PP
.B isnsadm
.RB [ ... ]
.RI --list " type attr=value
.PP
.B isnsadm
.RB [ ... ]
.RI --dd-register " attr=value
.PP
.B isnsadm
.RB [ ... ]
.RI --dd-deregister " dd-id attr=value
.PP
.B isnsadm
.RB [ ... ]
.RI --enroll " client-name attr=value
.PP
.B isnsadm
.RB [ ... ]
.RI --edit-policy " attr=value

.SH DESCRIPTION
.B Isnsadm
is a command line utility for interacting with an iSNS
server. It operates in one of several modes, which are
mutually exclusive.
Currently,
.B isnsadm
supports registration, query, and deregistration.
.SH OPTIONS
By default,
.B isnsadm
will take most of its settings from the configuration
file
.BR /etc/isns/isnsadm.conf ,
with the exception of the following options:
.TP
.BI \--config " filename\fR, " \-c " filename
This option overrides the default configuration file.
.TP
.BI \--debug " facility\fR, " \-d " facility
enables debugging. Valid facilities are
.PP
.TS
tab(,),box,center;
lb|lr.
socket,network send/receive
auth,authentication and security related information
message,iSNS protocol layer
state,database state
scn,SCN (state change notification) messages
esi,ESI (entity status inquiry) messages
all,all of the above
.TE
.PP
.TP
.BI \--local
makes
.B isnsadm
use a Local (aka Unix) socket when talking to the iSNS
server. This can be used by the administrator to perform
management tasks, such as enrolling new clients, editing
access control and so on. Local mode is only available
to the super user.
.TP
.BI \--server " servername\fR, " \-s " servername
specifies the server to use (if not specified
in the configuration file).
.TP
.BI \--control
makes
.B isnsadm
assume the identity of a control node. Control nodes are
special in that they have more rights in accessing and
modifying the database than normal storage nodes have.
.PP
When using this option,
.B isnsadm
will use the source name and DSA key specified by the
.BR Control.SourceName " and " Control.AuthKeyFile 
configuration options, respectively.
.PP
.TP
.BI \--key " attr" = value
This option is recognized in registration mode only, and
lets you specify an object key. For a more detailed explanation,
refer to section
.BR "Registration mode" .
.TP
.BI \--keyfile= filename
When creating a policy for a new iSNS client, 
.B isnsadm
is able to generate a DSA key for the client. The public
part of the key is stored in a policy object in the iSNS
server's database, whereas the private portion is stored in the
file specified by the
.B keyfile
option.
.B
.TP
.BI \--help
This will print a help message and exit.
.\"---------------------------
.SS Built-in help
.B Isnsadm
has built-in help functions. When invoked with
.BR \--help ,
it will print a general help message showing all supported
command modes, and exit. Specific help on an individual 
command mode is available by invoking that mode with a
single argument of
.BR help ,
like this:
.PP
.B isnsadm --register help
.PP
This will print a help message describing how to use this
command mode, followed by a list of attributes this command supports
and a help text describing the attribute.
.\"---------------------------
.SS Supported attributes
Most command modes take a list of attributes as arguments on the
command line. The naming and syntax of these attributes are
the same for all commands modes, however certain modes support
only a limited set of attributes.
.PP
Attributes are usually given as
.IB name = value
pairs. Where empty (or NIL) attributes are supported, the
attribute name by itself can be given.
.PP
The syntax of attribute
.I value
depends on the attribute type. For strings and numeric values,
no special conventions apply, but bitfields have a special syntax
described below.
.PP
The attribute name is usually preceded by the object
type it applies to (such as
.BR entity ),
followed by a hyphen and the name itself. However, where the
context clearly determines a specific object type, the prefix
can be omitted. For instance, when editing a policy object
using
.BR \--edit-policy ,
it is acceptable to use
.B node-type
as shorthand for
.BR policy-node-type .
.PP
Likewise, in a query command, it is not permitted to mix attributes
from different object types. Thus, the first attribute of a
query string establishes a type context, so that the following
two invocations are equivalent:
.PP
.B isnsadm --query pg-name=iqn.com.foo pg-addr=10.1.1.1 pg-port=860/tcp
.br
.B isnsadm --query pg-name=iqn.com.foo addr=10.1.1.1 port=860/tcp
.PP
.B Isnsadm
currently supports the following attributes:
.PP
.TS
tab(,),box,center;
li|lilili
lt|lbrlb.
Context,Attribute,iSNS tag,Aliases
_
Network Entity,entity-id,1,eid
\^,entity-prot,2
\^,entity-index,7
iSCSI Storage Node,iscsi-name,32
\^,iscsi-node-type,33
\^,iscsi-alias,34
\^,iscsi-idx,36
\^,iscsi-authmethod,42
Portal,portal-addr,16
\^,portal-port,17
\^,portal-name,18
\^,portal-esi-port,20
\^,portal-esi-interval,21
\^,portal-idx,22
\^,portal-scn-port,23
Portal Group,portal-group-index,52
\^,pg-name,48
\^,pg-addr,49
\^,pg-port,50
\^,pg-tag,51,pgt
\^,pg-idx,52
Discovery Domain,dd-id,2065
\^,dd-name,2066
\^,dd-member-iscsi-idx,2067
\^,dd-member-name,2068
\^,dd-member-fc-name,2069,
\^,dd-member-portal-idx,2070,
\^,dd-member-addr,2071,
\^,dd-member-port,2072,
\^,dd-features,2078,
Policy Object,policy-name,-,spi
\^,policy-key,-
\^,policy-entity,-
\^,policy-node-type,-
\^,policy-object-type,-
\^,policy-functions,-
.TE
.PP
.\"---------------------------
.SS Portal attributes
Portal information is conveyed by two separate attributes
in iSNS; an address attribute holding the IP address, and
a TCP/UDP port attribute holding the port number and an indication
of the protocol to be used (TCP or UDP).
.PP
When parsing a TCP/UDP port, Open-iSNS will expect a port number,
optionally followed by a slash and the protocol. Port names
such as "iscsi-target" are not supported.
.PP
As a convenience,
.B isnsadm
supports a notation representing a portal as one pseudo-attribute.
Separating address and port by a colon. Thus, the following two
are equivalent, with the latter being the shorthand representation
of the former:
.PP
.BI addr= <address> " port=" <port> [/ protocol ] \fR.
.BI portal= <adress> : port [/ protocol ]
.PP
This notation can be used in any context where an
.BR addr / port
attribute pair can appear, and may be prefixed by a type name,
as in
.BR pg-portal=... .
.PP
When using literal IPv6 addresses, the address has to be surrounded
by square brackets, otherwise the embedded colons would create
ambiguity:
.BR portal=[2001:5c0:0:2::24]:860/tcp
.PP
.\"---------------------------
.SS Bitfield attributes
Some iSNS attributes are words representing a bit field.
.B Isnsadm
displays and parses these attributes in human-readable form
rather than using the numerical value. The names of the bit
values are displayed by built-in help facilities. When specifying
a bitfield attribute on the command line, you can combine them
using the plus (\fB+\fP) or comma (\fB,\fR) character, like this:
.PP
.B node-type=control+initiator
.PP
.\"---------------------------
.SS Registration mode
Registration mode is selected by using the
.B --register
option, followed by a list of one or more objects
to register with the iSNS server.
By default, this will create a network entity for the
client (if none exists), and place the new objects inside
it.  Usually, you register all objects for
a network entity in one operation, rather than each
one separately.
.PP
Each object is specified as a type, optionally followed
by a comma-separated list of attributes, such as
this:
.PP
.B target=iqn.2005-01.org.open-iscsi.foo:disk1,alias=disk1
.PP
The following object types are currently supported:
.TP
.BI entity= name
Tells the server to group all objects in the specified
Network Entity container object.
Normally, the iSNS server will automatically assign an
entity name that is in line with its policies, and there is
no need to specify it explicitly.
.TP
.BI initiator[= name ]
This will register an iSCSI storage node of type initiator.
By default, the name is set to the iSNS source name.
.IP
This can be followed by any number of iSCSI storage node
attributes.
.TP
.BI target[= name ]
This will register an iSCSI storage node of type target.
By default, the name is set to the iSNS source name.
.IP
This object accepts the same set of attributes as
.BR initiator .
.TP
.BI control[= name ]
This will register an iSCSI storage node of type control.
By default, the name is set to the iSNS source name.
Only management nodes should be registered as control
nodes, as this gives a node complete control over the
iSNS database.
.IP
This object accepts the same set of attributes as
.BR initiator .
.TP
.BI portal=[ address:port/proto ]
This will register a portal using the given address,
port and protocol triple. If the triple is omitted,
.B isnsadm
will use the client host's IP address. If the portal
is preceded by an initiator registration (on the command
line), the port defaults to 860/tcp; if it is preceded by
a target registration, the port defaults to 3260/tcp.
For multi-homed hosts, the choice of address is
implementation dependent.
.IP
This can be followed by any number of portal attributes.
.TP
.B pg
This will register a portal group joining the preceding
portal and node. Portal groups can be used to describe
the preferred portals for a given node; please refer
to RFC 4171 for details.
.IP
This can be followed by any number of portal group attributes.
The attribute list must specify a portal group tag (PGT)
via the 
.BR pgt
attribute.
.PP
There are two additional command line options of interest,
which are used exclusively with Registration mode. One is
.BR \--replace .
Normally, registration mode will
.I add
new objects to the network entity associated with the client
host. If you specify
.B \--replace
on the command line, the server will wipe the network
entity completely, and remove all portals and storage
nodes it contained. Then it will create a new network
entity, and place the portals and storage nodes provided
by the caller inside.
.PP
In addition, it is possible to replace just parts of a
network entity. This is achieved by using the command line
option
.B \--key
to specify the object that should be replaced.
.PP
For instance, assume a network entity
contains the portal 
.BR 10.1.1.1:860 ,
and the client's network address changed to
.BR 10.2.7.7 .
Then the following command will atomically update the
database, replacing just the portal without touching the
registered storage nodes:
.PP
.B "  isnsadm --replace --key portal=10.1.1.1:860 portal=10.2.7.7:860
.PP
The
.B \--key
option recognizes only a subset of the usual attributes:
.RS
.TS
tab(,),box;
li|li
lb|lb.
Object type,Syntax
_
Entity,eid=\fIidentifier
Portal,portal=\fIaddress\fP:\fPport
iSCSI Node,iscsi-name=\fIname
.TE
.RE
.PP
To get a list of supported attributes, invoke
.BR "isnsadm --register help" .
.\"---------------------------
.SS Query mode
Query mode is selected by using the
.B --query
option. A query consists of a list of 
.BR attr = \fI value
pairs. All attributes must belong to the same object type,
i.e. queries that mix a Network Entity attribute with e.g.
a Portal attribute will be rejected.
.PP
It is also possible to specify an attribute name without
value (i.e. just
.BR attr ),
which will
will match any object that has such an attribute, regardless
of its value. This is useful when you want to query for all
objects of a given type.
.PP
To obtain a list of supported attributes, invoke
.BR "isnsadm --query help" .
.\"---------------------------
.SS List Mode
In this mode,
.B isnsadm
will display all objects of a given type, optionally
restricted to those matching certain attribute values.
.PP
The arguments to list mode are a
.IR "type name" ,
optionally followed by one or more 
.IB attr = value
pairs. Only attributes pertaining to the given
type are permitted; for instance, if you specify a
type name of
.BR portals ,
only portal attributes are permitted.
.PP
Possible type names are:
.BR entities ,
.BR nodes ,
.BR portals ,
.BR dds ,
.BR ddsets ,
.BR portal-groups ", and "
.BR policies .
.PP
Additional information is available via
.BR "isnsadm --list help" .
.\"---------------------------
.SS Deregistration mode
In this mode, you can deregister objects previously registered.
Only the node which registered an entity in the first place is
permitted to remove it, or any of its child objects. (Control
nodes are not bound by this restriction).
.PP
In deregistration mode, the argument list consists of a list of
.IB attr = value
pairs. Deregistration supports the same set of attributes as
query mode.
.\"---------------------------
.SS Discovery Domain Registration
This mode allows one to register a discovery domain or to add
new members to an existing discovery domain. Again, attributes
are specified as a list of
.IB attr = value
pairs. Only discovery domain attributes are recognized.
.PP
Note, in order to add members to an existing domain, you must
specify the domain's numeric ID. The domain's symbolic name
is not a valid handle when referring to a discovery domain.
.\"---------------------------
.SS Discovery Domain Deregistration mode
In this mode, you can deregister a discoery domain previously registered.
Only the node which registered a discovery domain in the first place is
permitted to remove it, or any of its members. (Control
nodes are not bound by this restriction).
.PP
In Discovery Domain deregistration mode, the argument list consists of
the Discovery Domain ID, followed by a list of
.IB attr = value
pairs. Discovery Domain Deregistration supports the same set of attributes as
query mode.
.\"---------------------------
.SS Client Enrollment
This mode only works when the server recognizes the client
as having control node capabilities, which is possible in
two ways:
.TP
Invoke
.B isnsadm \--local
as super user on the host 
.B isnsd
is running on. The
.B \--local
options tells it to communicate with the server through
the local control socket.
.TP
Invoke
.BR "isnsadm \--control" ,
which tells it to assume the identity of a control node.
When given this option,
.B isnsadm
will use the source name and DSA key specified by the
.BR Control.SourceName " and " Control.AuthKeyFile 
configuration options, respectively.
The server must be configured to grant this identity
control node status.
.PP
To enroll a client, use the
.B \--enroll
option, followed by the (source) name of the client to enroll.
This string will be used as the name of the security policy
the client will use to identify itself.
.PP
This is followed by a list of attribute/value pairs, where the
following set of attributes is supported:
.PP
.TS
tab(,),box,center;
li|lilili
lb|lrlb.
Attribute,Description,Aliases
_
name,Policy Name,spi
key,Client's DSA public key
entity,Assigned Entity Identifier
node-type,Permitted node type(s)
node-name,Permitted node name(s)
functions,Bitmap of permitted functions
object-type,Object access mask
.TE
.PP
The
.B key
attribute is used to specify the DSA
public key that the server should use to authenticate
messages from this client. You can either provide a
file name; in which case
.B isnsadm
will try to read the PEM encoded public key from that file.
If no
.B key
attribute is given, or when using
.BR key=gen ", " isnsadm
will generate a DSA key. The private portion of the newly
generated key will be stored in the file specified by
.BI --keyfile= filename \fR.
.PP
The
.B object-type
attribute is used to specify which object types the client
is permitted to access. This is a comma separated list of
.IB type : perm
pairs, where
.I type
can be any of 
.BR entity ", " iscsi-node ", " portal ", " portal-group ", " dd ", " ddset ", and " policy .
The permissions can be either 
.BR rw ", or " r .
.PP
The
.B functions
attribute can be used to restrict which functions the client is
permitted to invoke. This is a bitfield, using the standard function
names from RFC 4171, such as
.BR DevAttrReg ", " DevAttrQry ", etc."
.PP
For a description of the open-isns security model
and policies, please refer to the
.BR isns_config (5)
manual page.
.PP
.BR "Important note" :
In order to generate a DSA key, you have to have a set of DSA
parameters installed. By default,
.B isnsadm
expects to find them in
.BR /etc/isns/dsa.params .
These parameters are created by calling
.B isnsd \--init
once on the server machine. Alternatively, you can use
the following command:
.PP
.ti +8
openssl dsaparam 1024 -out /etc/isns/dsa.params
.ti -8
.PP
where 1024 is the chosen DSA key size, in bits.
.SH EXAMPLES
If you want to use Open-iSNS in authenticated mode,
you first need to initialize the server's DSA key and
DSA parameters. This can be done conveniently by using
.PP
.B isnsd --init
.PP
This will create the server's private and public key,
and place them in
.B /etc/isns/auth_key
and
.BR auth_key.pub ,
respectively.
.PP
The following command will create a policy object for a
node named 
.B isns.control ,
and grant it control privileges:
.PP
.B isnsadm --local --keyfile=control.key
.B --enroll isns.control \(rs
.br
.B "           node-type=ALL functions=ALL object-type=ALL
.PP
In the process of entrolling the client, this will generate
a DSA key pair, and place the private key portion in the
file
.BR control.key .
This file must be installed as
.BR /etc/isns/control.key
on the host you wish to use as an iSNS management station.
.PP
Next, you need to create a storage node object for the
management station:
.PP
.B isnsadm --local --register control
.PP
On the management station, you can then enroll additional
hosts:
.PP
.B isnsadm --control --keyfile=somehost.key
.B --enroll iqn.2005-01.org.open-iscsi.somehost \(rs
.br
.B "           node-type=target+initiator
.PP
Again, this will generate a DSA key pair and store the private
key portion in auth_key. Note the use of the
.B \--control
option that tells 
.B isnsadm
to use the identity of the control node instead of the default
key and source name.
.PP
You then need to copy
.B somehost.key
to the client host and install it as
.BR /etc/isns/auth_key .
Likewise, the server's public key (which resides in
.BR /etc/isns/auth_key.pub 
on the server) needs to be copied to the client machine,
and placed in
.BR /etc/isns/server_key.pub .
.PP
By default, when a client registers a storage node (be
it initiator or target) with iSNS, the client will not be
able to see any other storage nodes. In order for targets
to be visible to a given initiator, you need to create
so-called Discovery Domains (or DDs for short).
.PP
Currently, domain membership operations require administrator
privilege. Future extensions may allow iSNS clients to
add themselves to one or more DDs upon registration.
.PP
To create a discovery domain, and add nodes to it, you can
use
.PP
.B isnsadm --control --dd-register dd-name=mydomain \(rs
.br
.B "           member-name=iqn.org.bozo.client iqn.org.bozo.jbod ...
.PP
In order to add members to an existing DD, you have to
specify the numeric domain ID - using the DD name is not
sufficient, unfortunately (this is a requirement of the
RFC, not an implementation issue):
.PP
.B isnsadm --control --dd-register dd-id=42 \(rs
.br
.B "           member-name=iqn.com.foo member-name=iqn.com.bar
.PP
The DD ID can be obtained by doing a query for the DD name:
.PP
.B isnsadm --control --query dd-name=mydomain
.PP
In management mode, you can also register and deregister
nodes and portals manually, in case you want to fix up
an inconsisteny in the database. For instance, this will
register a node and portal on a host named client.bozo.org:
.PP
.B isnsadm --control --register entity=client.bozo.org \(rs
.br
.B "           initiator=iqn.org.bozo.client portal=191.168.7.1:860
.PP
Note that this registration explicitly specifies the network
entity in which to place the new objects. If you omit this,
the new objects will be placed in an entity named 
.BR CONTROL ,
which is decidedly not what you want.
.SH SEE ALSO
RFC 4171,
.BR isnsd (8),
.BR isns_config (5).
.SH AUTHORS
Olaf Kirch <olaf.kirch@oracle.com>
